---
title: "Metacognition: What the Research Says"
description: "Plain-language summaries of studies on metacognition: knowing what you know: methods, findings, effect sizes and limitations."
canonical: https://research.askpoppy.ai/topics/metacognition/
last_updated: 2026-10-21
---

# Metacognition: knowing what you know: research in plain words

How well learners judge their own understanding, and why some study methods and AI tools make that judgement worse.

## Summaries (4)

### [With AI, people scored better on reasoning puzzles but overestimated how well they did](/papers/fernandes-2026-ai-makes-you-smarter-but-none-the-wiser/)

Daniela Fernandes et al. (2026) · Two online experiments · Peer-reviewed

People who used AI to solve logical reasoning problems from the LSAT scored a little better than a norm group but overestimated their own score by even more. People with higher AI literacy were more confident and less accurate about how they had done.

### ["Your Brain on ChatGPT": what the MIT essay-writing study did and didn't show](/papers/kosmyna-2025-your-brain-on-chatgpt-cognitive-debt/)

Nataliya Kosmyna et al. (2025) · Lab experiment with EEG · Preprint (not peer-reviewed at the time of summary)

People who wrote essays with ChatGPT showed the weakest brain connectivity on EEG, felt the least ownership of their essays and often couldn't quote what they had just written, compared with people using a search engine or no tools. It is one of the most-shared "AI brain rot" studies, but it is a small, unreviewed lab study about essay writing, not proof of lasting brain damage.

### [Prompting learners to explain to themselves helps: a meta-analysis of 64 reports](/papers/bisra-2018-inducing-self-explanation-meta-analysis/)

Kiran Bisra et al. (2018) · Meta-analysis · Peer-reviewed

Across 69 effect sizes from 64 research reports, learners who were prompted to explain the material to themselves while studying or solving problems learned more than those who weren't. The average benefit was medium-sized and showed up across many subjects and settings.

### [The classic study: testing yourself beats rereading after a week](/papers/roediger-karpicke-2006-test-enhanced-learning/)

Henry L. Roediger III et al. (2006) · Lab experiments (landmark classic) · Peer-reviewed

Students who read a passage and then tried to recall it from memory remembered more two days and one week later than students who simply read it again. Rereading won only on a test five minutes later, and it made students more confident, which is part of why rereading feels better than it works.

## Free tools for this

- [Explain it back (Feynman self-check)](https://learn.askpoppy.ai/explain-it-back/)
- [Blurting method tool](https://learn.askpoppy.ai/blurt/)

Each summary says what the researchers did, who took part, what they found, the limitations, and whether we read the full paper or only the abstract.

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